Pipe insulation



Sept. 29, 1931. F. c. RUSSELL ET AL PIPE INSULATION Filed Nov. 10. 19302 Sheets-Sheet l Jwuentou Sept. 29,1931.-

F. c. RUSSELL ET AL PIPE INSULATION Filed Nov. 10. 1930 2 Sheets-Sheet 20/2710/2 L, Ja yidye Patented Sept. 29, 1931 UNITED STATES PATENTioFFlcE FRANK c. RUSSELL-AND cL mroN L. savrnen, or TOLEDO, 01110,ASSIGNOBS 'ro THE MINERAL FELT INSULATING COMPANY, or TOLEDO, 01110, ACORPORATIQN or 01110 PIPE IN SULATIOII Application filedl'ovember 10,1930. Serial No. 484,547.

This invention relates to the of forms offibrous material.

This invention has utility when incorporated in coverings for ducts orpipes.

Referring to the drawings:

Fig. 1 is a view, with parts broken away,

production Y ofanembodiment of the invention for the production ofooncavo-convex' sections, as pipe Coverings, showing the charging stagefrom the'Lhopper at the right and showing draining and forming stage atthe left;

Fig.' 2 is a section on the line II-II -1 Fig. 3 is a section on theline III-III Fig. 2; J a

Fig. 4 is a fragmentary perspective view of an article as dried andproduced by the device of Fig. 1;

Fig. 5 is a view; with portions broken away, of the article of Fig. 4,going through the trimming or facing o ration; Fig. 6 is a fragmentaryperspective view of the completed product hereunder;

Fig. 7 is a side view of portions of the hopper "and apparatus of Fig.1;

ig. 8 is a view of the cast product as removed from the formingoperation of Fig. 3 and supported by the core;

Fig. 9 is a view of the article in process with the core removed'and itsouter portion supported for drying in an oven or kiln, and I Fig. 10 isa fragmentary view of applying the product to a pipe.

. Hopper 1 is shown as a supply for fibrous material 2, as mineral orrock wool, sus-.

pended in a medium, as water, to maintain a general uniform distributionof the fiber.

Valve 3 from hopper. 1 may be opened by handle 4 and thus, throughapproximately the total maximum horizontal extent, direct gravitydischarge of the fibrous material from the hopper 1 into sleeve 5,suspended over former 6, shown as foraminous, and in providing a directdrainage from the fiber for the medium inwhich. the fiber 2 is insuspension. From this'charging stage, relative shifting is effectedbetween the hopper 1 and the sleeve 5 with the former 7 into position toreceive former element 7 includin a descending stroke with its terminalplate against .the former 7, in power depressing operation. This meansthat the former 7 completely traverses the sleeve 5 into the former 6and, as the medium drains through the former 6 foraminous portion, thefibrous material 2 is knit together or felted into the semi-pipe sectionform of casting having convex outer side 16 and concave inner side 17with faces 18 therefrom.

The piston 14 may have'recover stroke effected by shifting the valve 10for power fluid to act through line 19 to the lower portion of thecylinder 13, while exhaust from the line 12 occurs at the valve 10 Thearticle in the completed mold 6 7 may now be oriented to be supported bythe element 7 and the former portion 6 removed. In lieu thereof,imperforate' form 20 is placed thereon and the article oriented to havethe concave side upward. The element 7 is then removed and the articleinserted in an oven or kiln 21 for the drying operation. During thisdrying operation the imperforate form 20 may serve as a supporting shelland hold the article in shape.

After thisdrying operation, the article, preferably over-size as to thefinished product, is brought to support 22 with the form 20 removed. I

This support 22 may serve as a movablecradle and oversize, indicated bydotted lines 23 (Fig. 4), may be removed by rotary member or millerdevice 24 operated by motor v25. The miller or cutter device 24 runningat high-speed is made. up of el'eproduced has a finished inner portionor inside, with an outside jacket 31 of cheese cloth. A paper tube 32,of the pipe .exterior In this resisting-of attack, such 6. A feltedmineral wool molded pipe covering section provided with a waterproof.binder therein, and a jacket for the section embodying paper andfabric.

In witness whereof we aflix our signatures. FRANK C. RUSSELL.-

CLINTON L. SAVIDGE.

diameter, also serves as a stiifening core as well as a rotection forthe insulation until-it is rea (y for applying to pipe 33 by opening upan then repasting flap 34.

To facilitate beyond the felting holding of the mass to form, a bindermay be used having attributes of moisture or waterproofing, or even offireproofing. It has been found advantageous to include in-the bindercolloidal clay, such as Bentonite. Furthermore effective binding actionhas been had by 'a material reduction in the binder permitted whenAfrican asbestos fiber has been used up to one pound of the asbestos totwenty pounds of the mineral wool. This fiber is included in the hopperto be mixed at the picking stage, while the binder is included with theliquid and fiber at the getting of the mass into suspension.

' In imparting waterproofing properties, bi-

tuminous agents have been employed, such as a'sphaltic compositions.

What. is claimed and it is desired to secure by Letters Patent is:

1. In the forming of concavo-convex sec- ,tions, supplying fibrousmaterial for the bod in a suspension medium, draining the me iumtherefrom while mechanically expediting the taking of form for the bodyby changing upper surface form in departing from gravity level. contour,drying said formed section, trimming and jaoketing.

2. In the forming of concavo-c onvex sections, supplying fibrousmaterial for a body .in a suspension medium, draining the mediumtherefrom while mechanically expediting the taking of form in departingfrom gravity level contour, drying said formed section, trimming sectionabutting portions,

and jacketing other portions.

3, In the formin of concavo-convex sec tlons, supplying brous materialfor the body in suspension medium, draining the medium therefromwhilemechanically ex-.

pediting the taking of form in departing from gravity level contour,drying said formed section, facing-off inner portions, and ja cketingouter portions. 7

4:. A felted mineral wool molded pipe covering section, and ajackettherefor emfbod'ying paper and fabric.

5. A felted mineral wool molded pipe covering section embodyingwater-proof paper and cloth over said paper.

